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1G |
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First-generation wireless; analog cell
phones. |
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2.5G |
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Second-generation (2G)
wireless, plus faster data services. |
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3G |
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Third-generation wireless:
digital plus high-speed data and global roaming; known as IMT
2000 by the ITU and implemented in Europe as UMTS and in North
America as CDMA2000; goals are high-quality multimedia and advanced
global roaming (in-house, cellular, satellite). |
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802.11 |
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IEEE standards for wireless
LANs with specs for 1mbps, 2mbps, 11mbps, and 24mbps. |
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| A |
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access
point |
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Base station that plugs
into Ethernet hub or server; like a cellular phone system cell,
users can roam between access points. |
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AMPS |
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|
Advanced Mobile Phone
Service; the standard for analog cellular telephones; uses a
frequency-modulated transmission and frequency spacing to separate
user transmission; operates in the 800MHz band. |
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AMPS
modem |
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A wireless modem designed
for analog cellular phones. |
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AP |
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Access point; a base station
in a wireless LAN. Access points are typically standalone devices
that plug into an Ethernet hub or server. Like a cellular phone
system, users can roam around with their mobile devices and
be handed off from one access point to the other. |
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API |
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|
Application Programming
Interface. |
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ARDIS |
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Advanced National Radio
Data Service; established, nationwide packet data system from
American Mobile; provides 19.2kbps. |
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| B |
|
|
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Bluetooth |
|
|
Wireless personal area network (PAN) standard
geared for home and office; uses 2.4GHz band at 720kbps within
30-foot range. |
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broadband
wireless |
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|
Wireless transmission
at high speed. Wireless transmission is slower than wireline
speeds; thus, whereas land-based broadband generally starts
at T1 rates, wireless might be considered broadband starting
at 250kbps. |
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BSS |
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Base station subsystem. |
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bytecode |
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Content encoding where
the content is typically a set of low-level opcodes and operands
for a targeted hardware (or virtual) machine. |
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| C |
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CDMA |
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Code Division Multiple Access; Qualcomm's
spread-spectrum air-interface method. It codes each conversation
and expands it 128 times, which makes it easy to decipher at
the receiving end. |
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CDMA2000 |
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|
3G CDMA evolution from
CDMA One supported by CDMA One operators; now known as the 1X
Multi-Carrier mode (1X MC) in an overall standard for 3G CDMA. |
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CDMA
One |
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2G CDMA (IS 95). |
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CDPD |
|
|
Cellular Digital Packet
Data. A digital wireless transmission system that is deployed
as an enhancement to the existing analog cellular network. Based
on IBM's CelluPlan II, it provides a packet overlay onto the
AMPS network and moves data at 19.2kbps over ever changing unused
intervals in the voice channels. If all the channels are used,
the data is stored and forwarded when a channel becomes available.
CDPD was developed as a wireless extension to an IP network
and uses the four-octet (0.0.0.0) address for connections.
CDPD networks cover most of the major urban areas in the United
States and have been deployed by AT&T, Ameritech, GTE,
BellAtlantic Mobile, and other carriers. By the late 1990s,
incompatibility issues had been worked out, and roaming agreements
and interoperability between carriers is generally nationwide.
CDPD modems are available on PC Cards for laptop and handheld
computers.
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compact
HTML (cHTML) |
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Subset of HTML 2.0, HTML
3.2, and HTML 4.0 specifications designed for limited hardware
information appliances. |
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CTIA |
|
|
Cellular Telecommunications
Industry Association |
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CVSD |
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Continuous Variable Slope
Delta Modulation |
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| D |
|
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dispatch radio |
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Two-way radio used for taxis, trucks,
and fleets; always on. |
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dual-mode
handset |
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Cell phone that switches
from analog to digital or from land-based to satellite or from
cordless to cellular. |
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| E |
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EDGE |
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Enhanced Data rates for Global Evolution;
increased data throughput in GSM and TDMA systems to 384kbps. |
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Enhanced Messaging Service (EMS) |
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|
An open standard that allows pictures, sounds, animations, and formatted text to be swapped between compliant mobile phones. |
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| F |
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FCC |
|
|
Federal Communications
Commission |
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FireWire |
|
|
Originally developed by
Apple, this is an increasingly popular and very fast external
bus for transferring data between devices; also known as IEEE
1394 for the name of the standard it engendered. |
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